WO2011084114A2 - Flow based resonance absorber cabin at surface openings - Google Patents

Flow based resonance absorber cabin at surface openings Download PDF

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Publication number
WO2011084114A2
WO2011084114A2 PCT/TR2010/000236 TR2010000236W WO2011084114A2 WO 2011084114 A2 WO2011084114 A2 WO 2011084114A2 TR 2010000236 W TR2010000236 W TR 2010000236W WO 2011084114 A2 WO2011084114 A2 WO 2011084114A2
Authority
WO
WIPO (PCT)
Prior art keywords
flying field
air flow
absorber
flying
waiting
Prior art date
Application number
PCT/TR2010/000236
Other languages
French (fr)
Other versions
WO2011084114A3 (en
Inventor
Fatih Cevik
Mustafa Oguz
Hakan Isci
Original Assignee
Stm Savunma Teknolojileri Muh. Tic. A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stm Savunma Teknolojileri Muh. Tic. A.S. filed Critical Stm Savunma Teknolojileri Muh. Tic. A.S.
Priority to EA201270677A priority Critical patent/EA024081B1/en
Publication of WO2011084114A2 publication Critical patent/WO2011084114A2/en
Publication of WO2011084114A3 publication Critical patent/WO2011084114A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D23/00—Training of parachutists
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63G—MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
    • A63G31/00—Amusement arrangements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63G—MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
    • A63G31/00—Amusement arrangements
    • A63G2031/005—Skydiving

Definitions

  • the invention relates to absorbing of cavity resonances caused by the openings left parallel to the flow in the mediums wherein high velocity air flow is present.
  • the invention particularly relates to the vibration cabin placed at the inlet door for absorbing the cavity resonance (space oscillation, swinging, vibration) formed as a result of the flow separation formed at the door, which is found for entering into the flying field in the vertical wind tunnels used for parachutist training.
  • vertical wind tunnels are present in the prior art, which are used as parachutist training simulators for training of parachutists.
  • Vertical wind tunnels are formed of air channels having air flow in vertical direction.
  • Vertical wind tunnel comprises a flying area for the person to be trained in free flight and the person flying in this flying field acquires the experience of free falling simulation.
  • the air flow carrying the flying person is provided through a channel via the fans placed in the wind tunnel.
  • the trainee waiting in the waiting room which has a door opening to the flying field, is taken into the flying field after all the controls are complete.
  • the Japanese patent with no JP9327540 and the international patent with publication no WO2007008184 can be given as examples to vertical wind channels. While vertical wind tunnels can be used in special practices such as parachute or free skydiving, it can also be designed for public use with the purpose or amusement.
  • the present invention relates to flow based resonance absorber cabin at surface openings, which meets the above said requirements, eliminates all of the drawbacks and brings about some additional advantages.
  • the purpose of the invention is to eliminate the vibration problem formed by the cavity resonance in the complete interval from the initial velocity up to the flying velocity of the system.
  • Another purpose of the invention is to obtain a wider waiting area. Especially, adequate area is formed, for the military equipments that have larger area requirement and the number of personnel, which directly affects the education time, can be increased because of having larger area. In this way, the number of personnel can be increased in the groups to be trained. Mpre particularly, the purpose of the invention is to provide that the air pressure formed by the vertical movements made by the people being trained would not have any impact on the waiting roqrrv
  • the invention is the vertical wind tunnel comprising air flow channels having rectangular shaped structure, high power fan mechanisms for providing air flow inside the said air channels, flying field having the capacity to hold at least one person on air, who is to be trained inside at least one air flow channel, waiting area for the people kept waiting with the purpose of training, and waiting room at the passage from the waiting area to the flying field, and it comprises a vibration cabin, which is placed as a resonance absorber at the region where the flying field and the waiting area are found and in a way that it would correspond to the opening used for passage from the waiting room to the flying field, which has a closed i ⁇ ' ⁇ ' ' ⁇ ⁇
  • the volume which comprises insulators and at least one absorber placed at the bottom and side parts, at the surfaces contacting with the ground and the flying field walls in order to provide absorbing of the energy formed via enclosing of the cavitation resonance formed due to the air flow separations caused at the internal volume by the opening found in the flying field.
  • the invention is the vibration cabin placed behind the relatively large opening found on a surface in order to provide absorption of the cavitation resonance formed due to fluids flowing parallel to this surface, the opening found on this surface, and the wide volume found behind this opening, and it is characterized in that- it comprises at least one absorber, which absorbs energy via the resistance formed by the insulators placed at its bottom and side surfaces and by the adjustable non-return valves placed at the air inlet and outlet ports.
  • Figure 1 is the perspective view of the vertical wind tunnel used with the purpose of parachutist training.
  • Figure 2 is the top view of the vibration cabin of the invention placed at the opening, which is opened at the flying field from the waiting room.
  • Figure 3a is the section view of the air channel (together with the flying field and vibration cabin). :
  • Figure 3b is the detail view of the vibration cabin.
  • Figure 4 is the view of the prior art.
  • Figure 5 is the view of the prior art.
  • cavitation resonance is a physical reality formed by fluids flowing parallel to a surface, relatively large openings formed on this surface, and wide openings found behind these openings.
  • this vibration formed is absorbed via a vibration cabin (20) placed behind the opening and thus the destructive effects of this physical reality are eliminated.
  • the use related to the vertical wind tunnels used with the purpose of parachutist training is described as a preferred application of the invention. These descriptions are given for better understanding of the invention and they do not restrict the protection area of the invention.
  • FIG. 1 the perspective view of the vertical wind tunnels used with the purpose of parachutist training is given.
  • Vertical wind tunnel comprises air flow channels (10) having rectangle shaped structure, flying field (12) having the capacity to hold at least orie person (14) on air, who is to be trained inside at least one air flow channel (10), waiting area for the people (14) kept waiting with the purpose of training, waiting room (13) at the passage from the waiting area to the flying field, and high power fan mechanisms in order to provide air flow.
  • the vibration cabin (20) used as resonance absorber in the application of the invention is jplaced at the region where the flying field (12) and the waiting area (11) are found at the parachutist training simulator (wind tunnel) formed by the said air channels (10).
  • the said vibration cabin (20) is proposed in rectangular structure - while it can also be in different geometric shapes.
  • the cabin (20) is formed of outer frames (23) forming the carrier structure and glass surfaces (24) are formed between the said frames (23) in order to provide the personnel (14) to be trained with the facility to see the external medium.
  • the cabin (20) comprises at least one waiting room door (21) opening to the waiting room (13) and at least one flying field door (22) opening to the said flying field (12).
  • the flying field door (22), which opens to the flying field (12) wherein flying training would be conducted, is placed in a way that it would close the opening at the flying field (12) wherein air flow is present.
  • the cavitation resonance formed via the air flow separations formed by this opening is enclosed within the volume formed by the glasses and frames (3,4) of the said vibration cabin (20).
  • the energy created by this dynamic event is absorbed via the insulators (25) and the absorber (26) placed at the bottom and the side, in other words, at the surfaces of the said vibration cabin (20) contacting with the ground and the flying field (12) walls.
  • the said absorber (26) prevents movement of the said vibration cabin (20), which tries to rollover around the point (X) via the impact of the flow separation formed during passage of the air flow through the flying door (22) by having the flow direction shown in Figure 3.
  • the absorber (26) absorbs the energy formed in the vibration cabin (20) via the resistance formed by the adjustable non-return valves placed at the air inlet and outlet ports.
  • the said absorber (26) used in the preferred embodiments of the invention is pneumatic piston.
  • the invention can be used in the doors of all types of air freight systems opened for maintenance at the intrusions wherein measurement devices are placed. Moreover, it can be used in weapon or landing gear housings of aircrafts and behind the parachutist doors of cargo planes.
  • the protection area of this application has been specified under claims and cannot be lirpited to the descriptions only given as sampling above. It is obvious that a person skilled in the related art can apply the innovation disclosed by this invention into similar purposed other areas by means of changing the parts in form and using similar structures. Therefore, it is also clear that such embodiments lack of innovation criteria and especially the criteria of exceeding the known status of the art.

Abstract

The invention is the vertical wind tunnel comprising air flow channels (10) having rectangular shaped structure, high power fan mechanisms for providing air flow inside the said air channels (10), flying field (12) having the capacity to hold at least one person (14) on air, who is to be trained inside at least one air flow channel (10), waiting area (11) for the people (14) kept waiting with the purpose of training, and waiting room (13) at the passage from the waiting area (11) to the flying field (12), and it comprises a vibration cabin (20), which is placed as a resonance absorber at the region where the flying field (12) and the waiting area (11) are found and in a way that it would correspond to the opening used for passage from the waiting room (13) to the flying field (12), which has a closed volume, and which comprises insulators (25) and at least one absorber (26) placed at the bottom and side parts, at the surfaces contacting with the ground and the flying field (12) walls in order to provide absorbing of the energy formed via enclosing of the cavitation resonance formed due to the air flow separations caused at the internal volume by the opening found in the flying field (12).

Description

FLOW BASED RESONANCE ABSORBER CABIN AT SURFACE OPENINGS
The Related Art
The invention relates to absorbing of cavity resonances caused by the openings left parallel to the flow in the mediums wherein high velocity air flow is present. The invention particularly relates to the vibration cabin placed at the inlet door for absorbing the cavity resonance (space oscillation, swinging, vibration) formed as a result of the flow separation formed at the door, which is found for entering into the flying field in the vertical wind tunnels used for parachutist training.
The Prior Art It is known that vertical wind tunnels are present in the prior art, which are used as parachutist training simulators for training of parachutists. Vertical wind tunnels are formed of air channels having air flow in vertical direction. Vertical wind tunnel comprises a flying area for the person to be trained in free flight and the person flying in this flying field acquires the experience of free falling simulation. The air flow carrying the flying person is provided through a channel via the fans placed in the wind tunnel. The trainee waiting in the waiting room, which has a door opening to the flying field, is taken into the flying field after all the controls are complete. There are patent applications in the prior art related with vertical wind tunnels. The Japanese patent with no JP9327540 and the international patent with publication no WO2007008184 can be given as examples to vertical wind channels. While vertical wind tunnels can be used in special practices such as parachute or free skydiving, it can also be designed for public use with the purpose or amusement.
In vertical wind tunnels, prevention of the flow separation formed at the door found for entrance into the flying field and prevention of the cavity resonance formed as a result of this are quite important. As an example to the solutions in this subject, the international patent application with publication no WO2006012647 and title "Vertical wind tunnel with recirculation/free skydiving simulator and cable reducing dragging for i
use in wind tunnels and other places". The figures of the patent application related to the solution are given in Figure 4 and Figure 5. In the application disclosed in the said patent, cavity resonance is tried to be prevented via at least one rectifier/front end placed at the door entrance opening to the flying area. However, this solution does not have adequate effect in low air velocities and also the volume of the waiting area has to be smaller in this solution. In addition to this, it can not prevent the effect of the pressure formed by the vertical movements made by the people being trained inside the tunnel at the inlet door region during the parachute training on the waiting area walls. The applications of the prior art related to absorbing the cavity resonance can not provide the desired efficiency.
The number of examples about the applications related with absorbing of the cavity resonance formed as a result of flow separation caused at the door which is found for entering into the flying field in vertical wind tunnels can be increased, but all of the descriptions made in the prior art documents are inefficient and inadequate.
When the improvements in the prior art and the patent applications made are analyzed together, the presence of the need for a vibration cabin for absorbing the cavity resonance formed as a result of the flow separation formed at the door which is found for entering into the flying field in the vertical wind tunnels and the inadequacy of the prior solutions have necessitated an improvement in the related technical field.
Brief Description of the Invention
The present invention relates to flow based resonance absorber cabin at surface openings, which meets the above said requirements, eliminates all of the drawbacks and brings about some additional advantages.
Fr m the known status of the art, the purpose of the invention is to eliminate the vibration problem formed by the cavity resonance in the complete interval from the initial velocity up to the flying velocity of the system.
Another purpose of the invention is to obtain a wider waiting area. Especially, adequate area is formed, for the military equipments that have larger area requirement and the number of personnel, which directly affects the education time, can be increased because of having larger area. In this way, the number of personnel can be increased in the groups to be trained. Mpre particularly, the purpose of the invention is to provide that the air pressure formed by the vertical movements made by the people being trained would not have any impact on the waiting roqrrv
\n order to achieve the above said purposes, the invention is the vertical wind tunnel comprising air flow channels having rectangular shaped structure, high power fan mechanisms for providing air flow inside the said air channels, flying field having the capacity to hold at least one person on air, who is to be trained inside at least one air flow channel, waiting area for the people kept waiting with the purpose of training, and waiting room at the passage from the waiting area to the flying field, and it comprises a vibration cabin, which is placed as a resonance absorber at the region where the flying field and the waiting area are found and in a way that it would correspond to the opening used for passage from the waiting room to the flying field, which has a closed i · '■' ' ·
volume, and which comprises insulators and at least one absorber placed at the bottom and side parts, at the surfaces contacting with the ground and the flying field walls in order to provide absorbing of the energy formed via enclosing of the cavitation resonance formed due to the air flow separations caused at the internal volume by the opening found in the flying field.
In order to achieve the above said purposes, the invention is the vibration cabin placed behind the relatively large opening found on a surface in order to provide absorption of the cavitation resonance formed due to fluids flowing parallel to this surface, the opening found on this surface, and the wide volume found behind this opening, and it is characterized in that- it comprises at least one absorber, which absorbs energy via the resistance formed by the insulators placed at its bottom and side surfaces and by the adjustable non-return valves placed at the air inlet and outlet ports. In; order to achieve the above said advantages which will be better understood from the below detailed description, the present invention; brings about many advantages through its said characteristics.
The structural and characteristic features of the invention and all advantages will be understood better in detailed descriptions with the figures given below and with reference to the figures, and therefore, the assessment should be made taking into j
account the said figures and detailed explanations. Brief Description of the Figures
For better understanding of the embodiment of present invention and its advantages with its additional components, it should be evaluated together with below described figures. Figure 1 , is the perspective view of the vertical wind tunnel used with the purpose of parachutist training.
Figure 2, is the top view of the vibration cabin of the invention placed at the opening, which is opened at the flying field from the waiting room.
Figure 3a, is the section view of the air channel (together with the flying field and vibration cabin). :
Figure 3b, is the detail view of the vibration cabin.
Figure 4, is the view of the prior art.
Figure 5, is the view of the prior art.
Reference Numbers and Abbreviations 10.Air channel
11. Waiting . area
12. Flying field
13. Waiting room
14. Trainee 20.Vibration cabin
21.Waiting room door
22. Flying field door
23. Frame/carrier structure
24. Glass
25.lnsulator 26. Absorber
27. Valve set
Detailed Description of the Invention
In; this detailed description, the preferred embodiments of the flow based resonance absorber cabin (20) at surface openings, which is the subject of the invention, will only be disclosed for better understanding of the subject, and will not form any limiting effect.
In general, cavitation resonance is a physical reality formed by fluids flowing parallel to a surface, relatively large openings formed on this surface, and wide openings found behind these openings. In the preferred applications of the invention, this vibration formed is absorbed via a vibration cabin (20) placed behind the opening and thus the destructive effects of this physical reality are eliminated. Below, the use related to the vertical wind tunnels used with the purpose of parachutist training is described as a preferred application of the invention. These descriptions are given for better understanding of the invention and they do not restrict the protection area of the invention.
In Figure 1 , the perspective view of the vertical wind tunnels used with the purpose of parachutist training is given. Vertical wind tunnel comprises air flow channels (10) having rectangle shaped structure, flying field (12) having the capacity to hold at least orie person (14) on air, who is to be trained inside at least one air flow channel (10), waiting area for the people (14) kept waiting with the purpose of training, waiting room (13) at the passage from the waiting area to the flying field, and high power fan mechanisms in order to provide air flow.
The vibration cabin (20) used as resonance absorber in the application of the invention is jplaced at the region where the flying field (12) and the waiting area (11) are found at the parachutist training simulator (wind tunnel) formed by the said air channels (10). The said vibration cabin (20) is proposed in rectangular structure - while it can also be in different geometric shapes. The cabin (20) is formed of outer frames (23) forming the carrier structure and glass surfaces (24) are formed between the said frames (23) in order to provide the personnel (14) to be trained with the facility to see the external medium. The cabin (20) comprises at least one waiting room door (21) opening to the waiting room (13) and at least one flying field door (22) opening to the said flying field (12). The flying field door (22), which opens to the flying field (12) wherein flying training would be conducted, is placed in a way that it would close the opening at the flying field (12) wherein air flow is present. The cavitation resonance formed via the air flow separations formed by this opening is enclosed within the volume formed by the glasses and frames (3,4) of the said vibration cabin (20). The energy created by this dynamic event is absorbed via the insulators (25) and the absorber (26) placed at the bottom and the side, in other words, at the surfaces of the said vibration cabin (20) contacting with the ground and the flying field (12) walls. The said absorber (26) prevents movement of the said vibration cabin (20), which tries to rollover around the point (X) via the impact of the flow separation formed during passage of the air flow through the flying door (22) by having the flow direction shown in Figure 3. The absorber (26) absorbs the energy formed in the vibration cabin (20) via the resistance formed by the adjustable non-return valves placed at the air inlet and outlet ports.
The said absorber (26) used in the preferred embodiments of the invention is pneumatic piston.
Alternatively, the invention can be used in the doors of all types of air freight systems opened for maintenance at the intrusions wherein measurement devices are placed. Moreover, it can be used in weapon or landing gear housings of aircrafts and behind the parachutist doors of cargo planes. The protection area of this application has been specified under claims and cannot be lirpited to the descriptions only given as sampling above. It is obvious that a person skilled in the related art can apply the innovation disclosed by this invention into similar purposed other areas by means of changing the parts in form and using similar structures. Therefore, it is also clear that such embodiments lack of innovation criteria and especially the criteria of exceeding the known status of the art.

Claims

Vertical wind tunnel comprising air flow channels (10) having rectangular shaped structure, high power fan mechanisms for providing air flow inside the said air channels (10), flying field (12) having the capacity to hold at least one person (14) on air, who is to be trained inside at least one air flow channel "(10), waiting area (11) for the people (14) kept waiting with the purpose of training, and waiting room (13) at the passage from the waiting area (11) to the flying field (12), and it is characterized in that; it comprises a vibration cabin (20), which is placed as a resonance absorber at the region where the flying field (12) and the waiting area (11) are found and in a way that it would correspond to the opening used for passage from the waiting room (13) to the flying field (12), which has a closed internal volume, and which comprises insulators (25) and at least one absorber (26) placed at the bottom and side parts, at the surfaces contacting with the ground and the flying field (,12) walls in order to provide absorbing of the energy formed via enclosing of the cavitation resonance formed due to the air flow separations caused at the internal volume by the opening found in the flying field (12).
A wind tunnel according to Claim 1 , and it is characterized in that; the said absorber (26) placed in the vibration cabin (20) prevents movement of the said vibration cabin (20),. which tries to rollover around the point (X) via the impact of the flow separation formed during passage of the vertical direction air flow through the flying door (22).
A wind tunnel according to Claim 1 , and it is characterized in that; it absorbs the energy formed in the vibration cabin (20) via the resistance formed by the adjustable non-return valves (27) placed at the air inlet and outlet ports of the said absorber (26) that is placed in the vibration cabin (20).
A wind tunnel according to Claim 1 , and it is characterized in that; the said absorber (26) placed in the vibration cabin (20) is pneumatic piston.
A wind tunnel according to Claim 1 , and it is characterized in that; the said vibration cabin (20) is formed of outer frames (23) forming the carrier structure and the said frames (23) comprise glass surfaces (24) between them in order to provide the personnel (14) to be trained with the facility to see the external medium. A wind tunnel according to Claim 1 , and it is characterized in that; the said vibration cabin (20) comprises at least one waiting room door (21) opening to the waiting room (13).
A wind tunnel according to Claim 1 , and it is characterized in that; it comprises at least one flying field door (22), which opens to the said flying field (12), and which is placed in a way that it would close the opening at the flying field (12) wherein air flow is present.
The invention is the vibration cabin (20) placed behind the relatively large opening found on a surface in order to provide absorption of the cavitation resonance formed due to fluids flowing parallel to this surface, the opening found on this surface, and the wide volume found behind this opening, and it is characterized in that; it comprises at least one absorber (26), which absorbs energy via the resistance formed by the insulators (25) placed at its bottom and side surfaces and by the adjustable non-return valves (27) placed at the air inlet and outlet ports.
PCT/TR2010/000236 2010-01-06 2010-12-03 Flow based resonance absorber cabin at surface openings WO2011084114A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EA201270677A EA024081B1 (en) 2010-01-06 2010-12-03 Vertical wind tunnel comprising flow based resonance absorber cabin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2010/00065A TR201000065A2 (en) 2010-01-06 2010-01-06 Flow-resonant damping cabinet in surface openings
TR2010/00065 2010-01-06

Publications (2)

Publication Number Publication Date
WO2011084114A2 true WO2011084114A2 (en) 2011-07-14
WO2011084114A3 WO2011084114A3 (en) 2011-12-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2010/000236 WO2011084114A2 (en) 2010-01-06 2010-12-03 Flow based resonance absorber cabin at surface openings

Country Status (4)

Country Link
EA (1) EA024081B1 (en)
SA (1) SA111320074B1 (en)
TR (1) TR201000065A2 (en)
WO (1) WO2011084114A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017129223A1 (en) * 2016-01-25 2017-08-03 Indoor Skydiving Germany Gmbh Free fall simulator
CN110514385A (en) * 2019-08-05 2019-11-29 中国航空工业集团公司哈尔滨空气动力研究所 A kind of undercarriage aerodynamic noise test support device
JP2022505407A (en) * 2018-11-16 2022-01-14 スカイベンチャー インターナショナル（ユーケー）リミテッド． Recirculating vertical wind tunnel

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Publication number Priority date Publication date Assignee Title
JPH09327540A (en) 1996-06-11 1997-12-22 Hitachi Ltd Wind tunnel device
WO2006012647A2 (en) 2004-07-30 2006-02-02 Skyventure, Llc Recirculating vertical wind tunnel skydiving simulator and reduced drag cable for use in wind tunnels and other locations
WO2007008184A1 (en) 2005-07-12 2007-01-18 Victor Borisovich Petruk Wind tunnel for training sportsmen-parachutists

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US6139439A (en) * 1994-05-11 2000-10-31 Nicholas M. Kavouklis Means for linearizing an open air flow
US5655909A (en) * 1995-03-06 1997-08-12 Kitchen; William J. Skydiving trainer windtunnel
US6805558B1 (en) * 2000-11-20 2004-10-19 David Carl Free fall and game simulator
WO2004026687A2 (en) * 2002-08-20 2004-04-01 Aero Systems Engineering Inc. Free fall simulator
ITRM20030577A1 (en) * 2003-12-16 2005-06-17 Anita Galigani STRUCTURE INCLUDING ONE OR MORE DEVICES ACTS A

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Publication number Priority date Publication date Assignee Title
JPH09327540A (en) 1996-06-11 1997-12-22 Hitachi Ltd Wind tunnel device
WO2006012647A2 (en) 2004-07-30 2006-02-02 Skyventure, Llc Recirculating vertical wind tunnel skydiving simulator and reduced drag cable for use in wind tunnels and other locations
WO2007008184A1 (en) 2005-07-12 2007-01-18 Victor Borisovich Petruk Wind tunnel for training sportsmen-parachutists

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017129223A1 (en) * 2016-01-25 2017-08-03 Indoor Skydiving Germany Gmbh Free fall simulator
JP2022505407A (en) * 2018-11-16 2022-01-14 スカイベンチャー インターナショナル（ユーケー）リミテッド． Recirculating vertical wind tunnel
US11707689B2 (en) 2018-11-16 2023-07-25 Ifly Holdings, Llc Recirculating vertical wind tunnel
CN110514385A (en) * 2019-08-05 2019-11-29 中国航空工业集团公司哈尔滨空气动力研究所 A kind of undercarriage aerodynamic noise test support device

Also Published As

Publication number Publication date
WO2011084114A3 (en) 2011-12-08
TR201000065A2 (en) 2011-01-21
SA111320074B1 (en) 2014-10-27
EA201270677A1 (en) 2012-12-28
EA024081B1 (en) 2016-08-31

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